.backend-body,
.backend-login-body {
  background: #f3f6f9;
}

.backend-header {
  border-bottom: 1px solid #d7e0e8;
  background: #ffffff;
  position: sticky;
  top: 0;
  z-index: 20;
}

.backend-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
}

.backend-brand {
  color: #0d3047;
  text-decoration: none;
  font-weight: 700;
}

.backend-nav {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.backend-nav-link {
  text-decoration: none;
  color: #1b3f57;
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
}

.backend-nav-link.is-active,
.backend-nav-link:hover {
  background: #e8f1f7;
}

.backend-user {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.95rem;
}

.backend-logout {
  color: #1b3f57;
  text-decoration: none;
}

.backend-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
}

.backend-section {
  background: #fff;
  border: 1px solid #d7e0e8;
  border-radius: 14px;
  padding: 1rem;
}

.backend-table-wrap {
  overflow-x: auto;
}

.backend-table {
  width: 100%;
  border-collapse: collapse;
}

.backend-table th,
.backend-table td {
  text-align: left;
  border-bottom: 1px solid #e6edf2;
  padding: 0.6rem 0.5rem;
  vertical-align: top;
}

.backend-detail {
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.backend-detail div {
  display: grid;
  gap: 0.2rem;
}

.backend-detail dt {
  color: #4a6171;
  font-weight: 600;
}

.backend-detail dd {
  margin: 0;
}

.backend-fieldset {
  border: 1px solid #dde7ee;
  border-radius: 10px;
  padding: 0.75rem;
}

.backend-fieldset legend {
  font-weight: 700;
  padding: 0 0.3rem;
}

.backend-success,
.backend-error {
  border-radius: 10px;
  padding: 0.75rem;
}

.backend-success {
  background: #e7f8ea;
  border: 1px solid #9dd5ab;
}

.backend-error {
  background: #fdeaea;
  border: 1px solid #e6aaaa;
}

.backend-login-main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.backend-login-card {
  width: min(440px, 100%);
  background: #fff;
  border: 1px solid #d7e0e8;
  border-radius: 14px;
  padding: 1rem;
}